#!/bin/sh -e
##  The contents of this file are subject to the Mozilla Public License
##  Version 1.1 (the "License"); you may not use this file except in
##  compliance with the License. You may obtain a copy of the License
##  at http://www.mozilla.org/MPL/
##
##  Software distributed under the License is distributed on an "AS IS"
##  basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
##  the License for the specific language governing rights and
##  limitations under the License.
##
##  The Original Code is RabbitMQ.
##
##  The Initial Developer of the Original Code is GoPivotal, Inc.
##  Copyright (c) 2007-2015 Pivotal Software, Inc.  All rights reserved.
##

if [ "$RABBITMQ_ENV_LOADED" = 1 ]; then
    return 0;
fi

if [ -z "$RABBITMQ_SCRIPTS_DIR" ]; then
    # We set +e here since since our test for "readlink -f" below needs to
    # be able to fail.
    set +e
    # Determine where this script is really located (if this script is
    # invoked from another script, this is the location of the caller)
    SCRIPT_PATH="$0"
    while [ -h "$SCRIPT_PATH" ] ; do
        # Determine if readlink -f is supported at all. TODO clean this up.
        FULL_PATH=`readlink -f $SCRIPT_PATH 2>/dev/null`
        if [ "$?" != "0" ]; then
          REL_PATH=`readlink $SCRIPT_PATH`
          if expr "$REL_PATH" : '/.*' > /dev/null; then
            SCRIPT_PATH="$REL_PATH"
          else
            SCRIPT_PATH="`dirname "$SCRIPT_PATH"`/$REL_PATH"
          fi
        else
          SCRIPT_PATH=$FULL_PATH
        fi
    done
    set -e

    RABBITMQ_SCRIPTS_DIR=`dirname $SCRIPT_PATH`
fi

rmq_realpath() {
    local path=$1

    if [ -d "$path" ]; then
        cd "$path" && pwd
    elif [ -f "$path" ]; then
        cd "$(dirname "$path")" && echo $(pwd)/$(basename "$path")
    else
        echo "$path"
    fi
}

path_contains_existing_directory() {
    local path="${1:?}"
    local dir
    local rc
    local IFS="
    "
    for dir in $(echo "$path" | tr ':' '\n'); do
        if [ -d "$dir" ]; then
            return 0
        fi
    done
    return 1
}

RABBITMQ_HOME="$(rmq_realpath "${RABBITMQ_SCRIPTS_DIR}/..")"
ESCRIPT_DIR="${RABBITMQ_HOME}/escript"

## Set defaults
. ${RABBITMQ_SCRIPTS_DIR}/rabbitmq-defaults

## Get configuration variables from the configure environment file
[ "x" = "x$RABBITMQ_CONF_ENV_FILE" ] && RABBITMQ_CONF_ENV_FILE=${CONF_ENV_FILE}
[ -f ${RABBITMQ_CONF_ENV_FILE} ] && . ${RABBITMQ_CONF_ENV_FILE} || true

DEFAULT_SCHEDULER_BIND_TYPE="db"
[ "x" = "x$RABBITMQ_SCHEDULER_BIND_TYPE" ] && RABBITMQ_SCHEDULER_BIND_TYPE=${DEFAULT_SCHEDULER_BIND_TYPE}

DEFAULT_DISTRIBUTION_BUFFER_SIZE=128000
[ "x" = "x$RABBITMQ_DISTRIBUTION_BUFFER_SIZE" ] && RABBITMQ_DISTRIBUTION_BUFFER_SIZE=${DEFAULT_DISTRIBUTION_BUFFER_SIZE}

## Common defaults
SERVER_ERL_ARGS="+P 1048576 +t 5000000 +stbt $RABBITMQ_SCHEDULER_BIND_TYPE +zdbbl $RABBITMQ_DISTRIBUTION_BUFFER_SIZE"

# We save the current value of $RABBITMQ_PID_FILE in case it was set by
# an init script. If $CONF_ENV_FILE overrides it again, we must ignore
# it and warn the user.
saved_RABBITMQ_PID_FILE=$RABBITMQ_PID_FILE

if [ "$saved_RABBITMQ_PID_FILE" -a \
     "$saved_RABBITMQ_PID_FILE" != "$RABBITMQ_PID_FILE" ]; then
    echo "WARNING: RABBITMQ_PID_FILE was already set by the init script to:" 1>&2
    echo "           $saved_RABBITMQ_PID_FILE" 1>&2
    echo "         The value set in rabbitmq-env.conf is ignored because it" 1>&2
    echo "         would break the init script." 1>&2

    RABBITMQ_PID_FILE="$saved_RABBITMQ_PID_FILE"
fi

[ "x" = "x$RABBITMQ_USE_LONGNAME" ] && RABBITMQ_USE_LONGNAME=${USE_LONGNAME}
if [ "xtrue" = "x$RABBITMQ_USE_LONGNAME" ] ; then
    RABBITMQ_NAME_TYPE=-name
    [ "x" = "x$HOSTNAME" ] && HOSTNAME=`env hostname -f`
    [ "x" = "x$NODENAME" ] && NODENAME=rabbit@${HOSTNAME}
else
    RABBITMQ_NAME_TYPE=-sname
    [ "x" = "x$HOSTNAME" ] && HOSTNAME=`env hostname`
    [ "x" = "x$NODENAME" ] && NODENAME=rabbit@${HOSTNAME%%.*}
fi

##--- Set environment vars RABBITMQ_<var_name> to defaults if not set

rmq_normalize_path() {
    local path=$1

    # Remove redundant slashes and strip a trailing slash for a
    # PATH-like vars - ':' is the delimiter
    echo "$path" | sed -e 's#/\{2,\}#/#g' -e 's#/$##' -e 's#/:#:#g'
}

rmq_normalize_path_var() {
    local var warning

    local prefix="WARNING:"

    for var in "$@"; do
        local path=$(eval "echo \"\$$var\"")
        case "$path" in
        */)
            warning=1
            echo "$prefix Removing trailing slash from $var" 1>&2
            ;;
        esac

        eval "$var=$(rmq_normalize_path "$path")"

        if [ "x$warning" = "x1" ]; then
            prefix="        "
        fi
    done
}

rmq_check_if_shared_with_mnesia() {
    local var warning

    local mnesia_dir=$(rmq_realpath "${RABBITMQ_MNESIA_DIR}")
    local prefix="WARNING:"

    for var in "$@"; do
        local dir=$(eval "echo \"\$$var\"")

        case $(rmq_realpath "$dir") in
        ${mnesia_dir})
            warning=1
            echo "$prefix $var is equal to RABBITMQ_MNESIA_DIR" 1>&2
            ;;
        ${mnesia_dir}/*)
            warning=1
            echo "$prefix $var is located inside RABBITMQ_MNESIA_DIR" 1>&2
            ;;
        esac

        if [ "x$warning" = "x1" ]; then
            prefix="        "
        fi
    done

    if [ "x$warning" = "x1" ]; then
        echo "$prefix => Auto-clustering will not work ('cluster_nodes' in rabbitmq.config)" 1>&2
    fi
}

DEFAULT_NODE_IP_ADDRESS=auto
DEFAULT_NODE_PORT=5672
[ "x" = "x$RABBITMQ_NODE_IP_ADDRESS" ] && RABBITMQ_NODE_IP_ADDRESS=${NODE_IP_ADDRESS}
[ "x" = "x$RABBITMQ_NODE_PORT" ] && RABBITMQ_NODE_PORT=${NODE_PORT}

[ "x" = "x$RABBITMQ_NODE_IP_ADDRESS" ] && [ "x" != "x$RABBITMQ_NODE_PORT" ] && RABBITMQ_NODE_IP_ADDRESS=${DEFAULT_NODE_IP_ADDRESS}
[ "x" != "x$RABBITMQ_NODE_IP_ADDRESS" ] && [ "x" = "x$RABBITMQ_NODE_PORT" ] && RABBITMQ_NODE_PORT=${DEFAULT_NODE_PORT}

[ "x" = "x$RABBITMQ_DIST_PORT" ] && RABBITMQ_DIST_PORT=${DIST_PORT}
[ "x" = "x$RABBITMQ_DIST_PORT" ] && [ "x" = "x$RABBITMQ_NODE_PORT" ] && RABBITMQ_DIST_PORT=$((${DEFAULT_NODE_PORT} + 20000))
[ "x" = "x$RABBITMQ_DIST_PORT" ] && [ "x" != "x$RABBITMQ_NODE_PORT" ] && RABBITMQ_DIST_PORT=$((${RABBITMQ_NODE_PORT} + 20000))

[ "x" = "x$RABBITMQ_NODENAME" ] && RABBITMQ_NODENAME=${NODENAME}
[ "x" = "x$RABBITMQ_IO_THREAD_POOL_SIZE" ] && RABBITMQ_IO_THREAD_POOL_SIZE=${IO_THREAD_POOL_SIZE}
[ "x" = "x$RABBITMQ_SERVER_ERL_ARGS" ] && RABBITMQ_SERVER_ERL_ARGS=${SERVER_ERL_ARGS}
[ "x" = "x$RABBITMQ_CONFIG_FILE" ] && RABBITMQ_CONFIG_FILE=${CONFIG_FILE}
[ "x" = "x$RABBITMQ_LOG_BASE" ] && RABBITMQ_LOG_BASE=${LOG_BASE}
[ "x" = "x$RABBITMQ_MNESIA_BASE" ] && RABBITMQ_MNESIA_BASE=${MNESIA_BASE}
[ "x" = "x$RABBITMQ_SERVER_START_ARGS" ] && RABBITMQ_SERVER_START_ARGS=${SERVER_START_ARGS}
[ "x" = "x$RABBITMQ_SERVER_ADDITIONAL_ERL_ARGS" ] && RABBITMQ_SERVER_ADDITIONAL_ERL_ARGS=${SERVER_ADDITIONAL_ERL_ARGS}
[ "x" = "x$RABBITMQ_SERVER_CODE_PATH" ] && RABBITMQ_SERVER_CODE_PATH=${SERVER_CODE_PATH}
[ "x" = "x$RABBITMQ_MNESIA_DIR" ] && RABBITMQ_MNESIA_DIR=${MNESIA_DIR}
[ "x" = "x$RABBITMQ_MNESIA_DIR" ] && RABBITMQ_MNESIA_DIR=${RABBITMQ_MNESIA_BASE}/${RABBITMQ_NODENAME}
[ "x" = "x$RABBITMQ_GENERATED_CONFIG_DIR" ] && RABBITMQ_GENERATED_CONFIG_DIR=${GENERATED_CONFIG_DIR}
[ "x" = "x$RABBITMQ_ADVANCED_CONFIG_FILE" ] && RABBITMQ_ADVANCED_CONFIG_FILE=${ADVANCED_CONFIG_FILE}
[ "x" = "x$RABBITMQ_SCHEMA_DIR" ] && RABBITMQ_SCHEMA_DIR=${SCHEMA_DIR}
[ "x" = "x$RABBITMQ_IGNORE_SIGINT" ] && RABBITMQ_IGNORE_SIGINT="true"
[ "xtrue" = "x$RABBITMQ_IGNORE_SIGINT" ] && RABBITMQ_IGNORE_SIGINT_FLAG="+B i"

rmq_normalize_path_var \
    RABBITMQ_CONFIG_FILE \
    RABBITMQ_LOG_BASE \
    RABBITMQ_MNESIA_BASE \
    RABBITMQ_MNESIA_DIR

[ "x" = "x$RABBITMQ_PID_FILE" ] && RABBITMQ_PID_FILE=${PID_FILE}
[ "x" = "x$RABBITMQ_PID_FILE" ] && RABBITMQ_PID_FILE=${RABBITMQ_MNESIA_DIR}.pid
rmq_normalize_path_var RABBITMQ_PID_FILE

[ "x" = "x$RABBITMQ_BOOT_MODULE" ] && RABBITMQ_BOOT_MODULE=${BOOT_MODULE}

[ "x" = "x$RABBITMQ_PLUGINS_EXPAND_DIR" ] && RABBITMQ_PLUGINS_EXPAND_DIR=${PLUGINS_EXPAND_DIR}
[ "x" = "x$RABBITMQ_PLUGINS_EXPAND_DIR" ] && RABBITMQ_PLUGINS_EXPAND_DIR=${RABBITMQ_MNESIA_BASE}/${RABBITMQ_NODENAME}-plugins-expand
rmq_normalize_path_var RABBITMQ_PLUGINS_EXPAND_DIR

[ "x" != "x$RABBITMQ_ENABLED_PLUGINS_FILE" ] && RABBITMQ_ENABLED_PLUGINS_FILE_source=environment
[ "x" = "x$RABBITMQ_ENABLED_PLUGINS_FILE" ] && RABBITMQ_ENABLED_PLUGINS_FILE=${ENABLED_PLUGINS_FILE}
rmq_normalize_path_var RABBITMQ_ENABLED_PLUGINS_FILE

[ "x" != "x$RABBITMQ_PLUGINS_DIR" ] && RABBITMQ_PLUGINS_DIR_source=environment
[ "x" = "x$RABBITMQ_PLUGINS_DIR" ] && RABBITMQ_PLUGINS_DIR=${PLUGINS_DIR}
rmq_normalize_path_var RABBITMQ_PLUGINS_DIR

## Log rotation
[ "x" = "x$RABBITMQ_LOGS" ] && RABBITMQ_LOGS=${LOGS}
[ "x" != "x$RABBITMQ_LOGS" ] && export RABBITMQ_LOGS_source=environment
[ "x" = "x$RABBITMQ_LOGS" ] && RABBITMQ_LOGS="${RABBITMQ_LOG_BASE}/${RABBITMQ_NODENAME}.log"
[ "x" = "x$RABBITMQ_UPGRADE_LOG" ] && RABBITMQ_UPGRADE_LOG="${RABBITMQ_LOG_BASE}/${RABBITMQ_NODENAME}_upgrade.log"
[ "x" = "x$ERL_CRASH_DUMP" ] && ERL_CRASH_DUMP="${RABBITMQ_LOG_BASE}/erl_crash.dump"

rmq_normalize_path_var RABBITMQ_LOGS

rmq_normalize_path_var RABBITMQ_UPGRADE_LOG

[ "x" = "x$RABBITMQ_CTL_ERL_ARGS" ] && RABBITMQ_CTL_ERL_ARGS=${CTL_ERL_ARGS}

# Check if files and directories non-related to Mnesia are configured
# to be in $RABBITMQ_MNESIA_DIR. If this is the case, issue a warning
# because it will prevent auto-clustering from working (the node will be
# considered non-virgin).

rmq_check_if_shared_with_mnesia \
    RABBITMQ_CONFIG_FILE \
    RABBITMQ_LOG_BASE \
    RABBITMQ_PID_FILE \
    RABBITMQ_PLUGINS_EXPAND_DIR \
    RABBITMQ_ENABLED_PLUGINS_FILE \
    RABBITMQ_PLUGINS_DIR \
    RABBITMQ_LOGS \
    RABBITMQ_UPGRADE_LOG

##--- End of overridden <var_name> variables

## Development-specific environment.
if [ "${RABBITMQ_DEV_ENV}" ]; then
    if [ "$RABBITMQ_PLUGINS_DIR_source" != 'environment' -o \
         "$RABBITMQ_ENABLED_PLUGINS_FILE_source" != 'environment' ]; then
        # We need to query the running node for the plugins directory
        # and the "enabled plugins" file.
        eval $( (${RABBITMQ_SCRIPTS_DIR}/rabbitmqctl eval \
            '{ok, P} = application:get_env(rabbit, plugins_dir),
             {ok, E} = application:get_env(rabbit, enabled_plugins_file),
             B = os:getenv("RABBITMQ_MNESIA_BASE"),
             M = os:getenv("RABBITMQ_MNESIA_DIR"),
             io:format(
               "plugins_dir=\"~s\"~n"
               "enabled_plugins_file=\"~s\"~n"
               "mnesia_base=\"~s\"~n"
               "mnesia_dir=\"~s\"~n", [P, E, B, M]).' \
            2>/dev/null | head -n 4) || :)
        if [ "${plugins_dir}" -a \
             "$RABBITMQ_PLUGINS_DIR_source" != 'environment' ]; then
            RABBITMQ_PLUGINS_DIR="${plugins_dir}"
        fi
        if [ "${enabled_plugins_file}" -a \
             "$RABBITMQ_ENABLED_PLUGINS_FILE_source" != 'environment' ]; then
            RABBITMQ_ENABLED_PLUGINS_FILE="${enabled_plugins_file}"
        fi
        if [ "${mnesia_base}" -a \
             "$RABBITMQ_MNESIA_BASE_source" != 'environment' ]; then
            RABBITMQ_MNESIA_BASE="${mnesia_base}"
        fi
        if [ "${mnesia_dir}" -a \
             "$RABBITMQ_MNESIA_DIR_source" != 'environment' ]; then
            RABBITMQ_MNESIA_DIR="${mnesia_dir}"
        fi
    fi

    if path_contains_existing_directory "${RABBITMQ_PLUGINS_DIR}" ; then
        # RabbitMQ was started with "make run-broker" from its own
        # source tree. Take rabbit_common from the plugins directory.
        ERL_LIBS="${RABBITMQ_PLUGINS_DIR}:${ERL_LIBS}"
    else
        # RabbitMQ runs from a testsuite or a plugin. The .ez files are
        # not available under RabbitMQ source tree. We need to look at
        # $DEPS_DIR and default locations.

        if [ "${DEPS_DIR}" -a -d "${DEPS_DIR}/rabbit_common/ebin" ]; then
            # $DEPS_DIR is set, and it contains rabbitmq-common, use
            # this.
            DEPS_DIR_norm="${DEPS_DIR}"
        elif [ -f "${RABBITMQ_SCRIPTS_DIR}/../../../erlang.mk" -a \
               -d "${RABBITMQ_SCRIPTS_DIR}/../../rabbit_common/ebin" ]; then
            # Look at default locations: "deps" subdirectory inside a
            # plugin or the Umbrella.
            DEPS_DIR_norm="${RABBITMQ_SCRIPTS_DIR}/../.."
        fi
        DEPS_DIR_norm=$(rmq_realpath "${DEPS_DIR_norm}")

        ERL_LIBS="${DEPS_DIR_norm}:${ERL_LIBS}"
    fi
else
    if path_contains_existing_directory "${RABBITMQ_PLUGINS_DIR}" ; then
        # RabbitMQ was started from its install directory. Take
        # rabbit_common from the plugins directory.
        ERL_LIBS="${RABBITMQ_PLUGINS_DIR}:${ERL_LIBS}"
    fi
fi

ERL_LIBS=${ERL_LIBS%:}
if [ "$ERL_LIBS" ]; then
    export ERL_LIBS
fi

run_escript()
{
    escript_main="${1:?escript_main must be defined}"
    shift
    escript="${1:?escript must be defined}"
    shift

    # shellcheck disable=SC2086
    exec "${ERL_DIR}erl" +B \
        -boot "${CLEAN_BOOT_FILE}" \
        -noinput -noshell -hidden -smp enable \
        ${RABBITMQ_CTL_ERL_ARGS} \
        -sasl errlog_type error \
        -mnesia dir "\"${RABBITMQ_MNESIA_DIR}\"" \
        -nodename "$RABBITMQ_NODENAME" \
        -run escript start \
        -escript main "$escript_main" \
        -extra "$escript" "$@"
}

RABBITMQ_ENV_LOADED=1

# Since we source this elsewhere, don't accidentally stop execution
true
